VT machining offers CNC Laser Cutting for 42CrMo Steel (GB/T 3077 / ~4140 / 42CrMo4), typically supplied Q&T. Chinese equivalent of 4140/42CrMo4.
CNC Laser Cutting Notes for 42CrMo Steel
Fibre-laser cutting of 42CrMo Steel sheet gives a narrow kerf with minimal burr.
For estimating, a 100 × 100 × 10 mm block of 42CrMo Steel weighs about 0.79 kg.
Process Data for CNC Laser Cutting 42CrMo Steel
| Max practical thickness (6 kW fibre) | 25 mm |
|---|---|
| Assist gas | Oxygen |
| Kerf width | 0.1-0.3 mm |
| Profile tolerance | ±0.1 mm (≤6 mm), ±0.2 mm thicker |
Typical values for 42CrMo Steel, Q&T; confirmed on the first part.
42CrMo Steel Data Relevant to CNC Laser Cutting
| Equivalent designations | GB/T 3077 / ~4140 / 42CrMo4 |
|---|---|
| Key composition | C 0.38-0.45%, Cr 0.9-1.2%, Mo 0.15-0.25% |
| Density | 7.85 g/cm³ |
Typical values; we work to your drawing and mill certificate.
More on CNC Laser Cutting Steel
Finishing options, quality documentation and general cnc laser cutting guidance for all steel grades are on our CNC Laser Cutting Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Laser Cutting 42CrMo Steel
Send a STEP/IGES model or PDF drawing, confirm 42CrMo Steel and its condition (we usually see it supplied Q&T), the quantity, critical tolerances and any finish or certificate requirements.
42CrMo Steel in Other Processes
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Send the drawing, the 42CrMo Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
How clean are the edges produced by CNC Laser Cutting on 42CrMo Steel?
Laser cutting leaves 42CrMo Steel with a narrow kerf and a clean, near burr-free edge and only a small heat-affected zone.
What surface finish is achievable on 42CrMo Steel with CNC Laser Cutting?
Laser cutting leaves a clean cut face on 42CrMo Steel with a small heat-affected zone; most parts need little secondary finishing.
Why is 42CrMo Steel a good choice for CNC Laser Cutting?
42CrMo Steel is strong, economical and widely available, which makes it well suited to CNC Laser Cutting. We tune the process to the alloy so the finished 42CrMo Steel cutting part meets your dimensional and functional requirements.
What is the typical lead time and minimum order for CNC Laser Cutting 42CrMo Steel?
CNC Laser Cutting prototypes for 42CrMo Steel can be produced quickly and scaled to series production. Send your drawing and quantity and we will advise lead time and any minimum order.
What material thickness or size range suits CNC Laser Cutting 42CrMo Steel?
Laser-cut 42CrMo Steel thickness depends on the alloy and its reflectivity; we tune the fiber source and assist gas accordingly.